Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2018
Accounting Policies [Abstract]
Deferred lease liability		$ 86,000
Operating lease, right-of-use asset		$ 1,800,000
Reclassification a net unrealized gain from the change in tax rate with an increase	$ 41,000

Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=115928272&loc=d3e28680-109314

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant